2.2 细胞中的无机物（教学设计）2026-2027学年高一上学期生物人教版必修1

课题名称

2.2 细胞中的无机物（1课时）

课堂类型：                 新课              □复习课             □习题课              □实验课          □试卷讲评课           □其他：

学习者               分析

高一学生已经具备一定的细胞生物学基础，本节课难度不大，学生对水和无机盐的认识比较丰富，许多概念来自生活中的经验。但是从活细胞的角度来看，学生的认识还有需要补充、纠正和系统化的地方。教师需要将本节较为散乱的知识点用问题串联系起来。

教学目标

1、指出水大约占细胞质量的2/3，以自由水和结合水的形式存在，赋予了细胞许多特性，在生命活动中具有重要的作用。

2、举例说出无机盐在细胞内含量虽少，但与生命活动密切相关。

3、认识到细胞和生物体的各种生命活动都有其物质基础，初步形成生命的物质性观点，为树立辩证唯物主义世界观打基础。

教学重点

1、水在细胞中的存在形式及作用；

2、无机盐在细胞中的存在形式及作用。

落实教学重点的方法：

1、生活实例进行讲解

教学难点

1、结合水的概念；

2、无机盐的作用。

突破教学难点的方法：

1、生活实例讲解

教学资源       选择

教师用书、教材、题单

技术手段的使用：

电子白板、板书、多媒体

课时：

1课时

核心问题      

1、水在细胞中以什么形式？存在具有哪些重要作用？

2、为什么细胞中的无机盐含量很少，作用却很重要？                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      

教学过程设计

问题情境

教学活动设计 （学习活动设计）

设计意图 

引入新课

生活中口渴你会怎么做？

在马拉松比赛中，我们需要给运动员补充水分，一般提供的是哪种？

今天进入第二节细胞中的无机物，先来学习水。

积极思考和讨论问题，从而进入到新课的学习中。

问题情境

教学活动设计 （学习活动设计）

设计意图 

细胞中的水

教师呈现不同生物体中的含水量，由此得出水是生物体中含量最多的化合物，其中水生植物比陆生植物的含水量多。男性体内水比女性体内多。

1、水的含量

（1）生物种类：水生生物____陆生生物。

（2）生长发育阶段：幼儿____成年；幼嫩部分____成熟部分。